the last mod lasted almost an entire year from revision 1395 (331 days ago) that fixed the signature and this evening youtube stopped working for me, youtube updated the player script and the regex to extract the signature doesn't work anymore.

Here the new one that replaces the old one at line 430 in the youtube3-proxy.php file.

They changed the url of the js file inside the html page. Before it was the full url, now only the relative path so I needed to add "https://www.youtube.com" ahead of it.Also a little tweak to the signature regex.